Hello there! As I am typing this, I am looking at the toy line for The Last Knight. Within the toy line products, I came across something rather stunning that may leak to The Last Knight's plot. As a very big fan of Transformers, this is very stunning to type about. As some may know, there is a remake of the Age of Extinction Optimus Prime toy (that included the sword and shield) called the Shadow Spark Optimus Prime. Now, you might say "what's that have to do with Unicron?" Well, the answer is look upon the back of the box. The description of the Shadow Spark Optimus Prime reads "OPTIMUS PRIME leaves Earth to stand against his creators in defense of our planet. He finds unexpected dangers in the blackness of outer space, including a new threat with the power to destroy us all." Let's review that again, shall we? Let's mainly focus on the last bit "with the power to destroy us all." Which transformer(s) in the history of the whole Transformers universes has the power to destroy "us" all? Out of ideas? It's Unicron! Unicron has been around since G1. He's been the main bad guy. He's even considered the "Brother of Primus" in the Transformers Prime universe. On the note of Primus, Primus is actually Cybertron. And in Dark of the Moon, Cybertron was destroyed due to the space bridge control pillar being destroyed. So, if Primus is no more and Cybertron is gone, why hasn't evil consumed the universe? It is, slowly. It even effected Earth. AOE was about killing Autobots & Decepticons alike because they were considered evil. Now, with his brother Primus gone, Unicron has the ability to take Earth because his brother can't stop him! He took over Optimus Prime, henceforth "Shadow Spark" because Prime has been altered by Unicron because the Matrix, a portion of Primus' spark, is useless due to Primus being destroyed! So, in conclusion to my evidence, Because Primus died in Dark of the Moon, Unicron IS going to be in The Last Knight because there is nothing left to stop Unicron's power to destroy us all. What do you think?